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18 Dec 2019

Dr. gasby favorite student made a new compound H2O2. Dr. gasby student noted that the compound has some of the same atoms as H2O and is convinced that it would have the same physical and chemical properties as H2O. Do you believe that H2O2 will have the same chemical and physical properties as H2O. Why or why not, please explain.

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I need help doing my lab homework, I missed lab that day because, I was sick and it's due.

Chemical Reactions and Equations Learning objectives To observe physical and chemical properties associated with chemical changes To be able to give evidence for the occurrence of a chemical reaction To write a balanced chemical equation To identify areaction as a combination, decomposition, precipitation, single or double replacement, or combustion reaction ntroduction When a substance undergoes a physical change, it changes its appearance but not its composition. For example, when ice melts to form water, it undergoes a physical change from solid to liquid. In a chemical change, the composition of a substance is changed to give a new substance with different physical and chemical properties. For example, when silver tarnishes, the shiny silver (Ag) changes to a dull gray silver sulfide (AgaS). Not only has the chemical formula changed from Ag to Agus, but also the physical properties (shininess) of the substance have changed. Some examples of physical and chemical changes are listed in Table 1 below. Table 1. Comparison of Physical and Chemical Changes Examples of Physical changes Examples and Evidence of Chemical Changes Change in state (melting, freezing, evaporating Formation of a gas (bubbles) subliming) Formation of a solid (precipitate) Change in size Tearing Change in Color Heat is given off or absorbed A solid dissolving in a solvent In a chemical reaction, atoms in the reactants are rearranged to produce new combinations of atoms in the products. However, the total number of atoms of each element in the reactants is equal to the total number of atoms in the products. This is true according to the Law of Conservation of Mass, which states that the total mass remains constant during a chemical reaction. In other words, matter cannot be created or destroyed in a chemical reaction. In a chemical equation, the reactants are shown on the left and the products are on the right. An arrow in between indicates that a chemical reaction occurs. Finally, the physical state of each compound is designated in parentheses after the chemical formula. Solid, liquid, gas, and aqueous (dissolved in water) are shown as(s,(n,(g), and (aq), respectively.

Can you explain this in detail? using Equilibrium properties and using Le Chatelier principles

In the experiment for classifying matter by properties

1. Tap water is often river water that has been filtered andtreated to remove bacteria, but not distilled. Distillation is theevaporation and subsequent condensation of a liquid. Distilledwater is preferred for many common uses such as in steam irons, andas a solvent in analytical chemistry. Explain why distilled wateris better than tap water for these two purposes.

2. (a) Are the properties you described in column 2 of Table 1physical or chemical properties? Briefly explain.

(b) Is solubility a physicval or chemical property? Brieflyexplain.

3. If someone gave you a sample of a metallic element, whatphysical properties might you use to identify the element? Assumeyou have a referance, such as the Handbook of Chemistry andPhysics, that lists physical properties of the elements.

4. Suggest a method for separating a mixture of sugar, powderediron, and sawdust.

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